The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 19, 2025
Filed:
Feb. 16, 2024
Pratt & Whitney Canada Corp., Longueuil, CA;
Chao Zhang, Vaughan, CA;
Rambod Larijani, Mississauga, CA;
Pratt & Whitney Canada Corp., Longueuil, CA;
Abstract
A method of producing a centrifugal compressor impeller is provided. The impeller includes a hub with a rotational axis, and forward and aft surfaces. The aft surface extends between an outer radial surface of the impeller and a bore centered on the rotational axis. The method includes: analyzing the impeller to determine a stress field having tangential stress data values and radial stress data values as a function of radial position within the impeller hub and as a function of axial position within the impeller hub; determining biaxiality ratio (BR) data using the determined tangential stress data values and the determined radial stress data values; determining a peak von Mises creep strain location on the impeller; contouring the aft surface at the peak von Mises creep strain location using the radial stress data values and the BR data; and producing the impeller with the contoured aft surface.